Improvement in ventilating school-house stoves



J. oTRossx usj Ventilating School-House Stove. No. 221,811.

Patented Nov 18, 1879..

N. PETERS PHOI'Q-UTMOGRAFHER, WASHINGTON. D. c.

UNITED STATES PA'IET JOHN GROSSIUS, OF CINCINNATI, OHIO.

Specification forming part of Letters Patent No. 2 2LSII, dated November 18, 1879; application filed November 18,1878.

To all whom it may concern Be it known that I, JOHN GROSSIUS, of Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and Improved Ventilating School-House Stove; and I do hereby declare the following to be a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use it, reference being had to the accompanying drawings, forming part of this specification, in which-- a Figure 1 is a central vertical section of my improved stove, looking toward the back. Fig. 2 is a central vertical section of the base and fire-pot, taken in a plane at right angles to the drawings.

My present invention consists in certain improvements upon the ventilating school-house stove for which Letters Patent of the United States No. 104,581 were granted and issued to me June 21, 1870, which improvements I will now proceed to describe, and point out in the claims.

In the accompanyingdrawin gs I have shown the principal features of the heater upon which my former patent is based and to which my present improvements are applied. These features consist ina stove, A, supported upon a fire-pot, B, and provided around the upper end with an annular drum, G, communicating at its rear side with the smoke-pipe D, and at its front side with the interior of the stove through an opening, E, vertical flues F F through the drum and around the stove serving to circulate and heat the air.

are inclosed by a sheet-metal jacket or case, Gr, secured to the floor of a room over an opening, H, communicating with a conduit, H, through which fresh air from the outside of the room is admitted around the stove within the jacket. The jacket is provided at its top with a water-basin, I, and with a register, J,

i the weather.

These parts When the stove is in operation fresh air isadmitted to the jacket through the conduit under the floor, and, circulating around the stove and through the heating-fines F F, is discharged into the room in the requisite quantity through the top register, J 'By closing this register and opening the side registers, K, the heated air escapes through the latter for warming or drying the feet of persons resting upon the foot-support.

The bottom of the jacket, or the opening in the floor leading thereto, is provided with a suitable register, N, by which the supply of fresh air is accommodated to the capacity of the stove and the varieties in the temperature of In very cold weather less fresh air is required, and the register can then be nearly closed. ,In warmer weather it may be opened wider.

The register is operated by a handle, 0, extending through the side of the base which supports the jacket.

The jacket is made in two parts, I? P, of sheet metal, supported upon the cast-iron baseri g Q, which may be fastened to the floor in any convenient manner. cheapens the cost of manufacture and provides readier means for access to the interior of the jacket for fitting up and repairing the stove.

The ashboX is castin the form of an oblong case, B, supported diametrically within the basering by any proper means, with theope-ning for the introduction and removal of the ash-pan arranged for access through. a single or double door, It, in the lower part, 1?, of the jacket, and with a horizontal air-flue, S, at its rear end, communicating with the outside of the jacket through a register, T, in the" part P.

The flue S is located somewhat above the floor of the ash-box, as-shown in Fig. 2, for

the purpose of stopping the ash-pan at the proper point under the grate and to prevent the ashes from passing into the flue.

The register T for the air-fine and the door v ion,

This con struction 2 22!,Skl

. part P the ash-box and its connections will be exposed.

It will therefore be seen that by making the jacket in sections access can be readily had to the whole lower part of the stove for the purposes stated.

One means forholding the ash-box and its connections within the base-ring consists in supporting its rear end from the interior of the ring by braces V V, and resting its front end either upon the edge of the ring or upon a ledge inside the ring. The manner of its connection is, however, immaterial so long as the supports do not interfere with the operation of the fresh-air register.

The air-flue T, by communicating with the ash-box, is employed to conduct the foul air from the room directly into the interior of the stove, and therefore acts as a ventilator, in connection with the supply of fresh air which is heated and discharged into the room through the top register.

The foul air from the room being fed directly into the stove, and the fresh air being supplied through the bottom of the jacket from the outside of the room, the stove forms a complete heater and ventilator. As the fresh air is admitted it passes around the stove, becomes heated, and is discharged into the room through the top register, while the foul air descends and is fed to the fire through the foulair flue. The base-rin g Q, not being provided with side openings, permits such circulation, because it excludes the foul-air in the room from the space between the jacket and stove.

W is the grate-rim, surrounding a circular opening in the top of the ash-box, and X is the grate.

My improvements in this part of the stove form the subject of a separate application for Letters Patent which I am about to make, and therefore are not claimed in the present case. I consider it necessary, however, to describe them herein, for the purpose of enabling others skilled in the art to make and use the stove as a whole. The following description of the grate and the means for its operation is made with this object in view:

Y is the supporting-bar of the grate, which, instead of extendin g diametrically across the grate-opening, is arranged with its rear end in the center thereof and its front end to the tical plane. The downward curve of the T- head rests down upon the lower pin, and the upward curve bears against the under side of the upper pin. The front end, I), of the bar is curved a little to one side, and formed with a notch in its under side, which fits over a hook, c, on the grate-rim, as shown. By this construction the bar can be easily applied and removed, and when in place is effectually prevented from turning upon its supports.

The center of the bar carries a lateral upturned double hook, D, the inner prong, e, of which fits into a central recess in the under side of the grate to support the latter and form a pivot, upon which it is oscillated to sift the ashes. The outer prong, f, serves to catch and hold the grate when dumped. The flattened or squared handle g of the grateis a little on one side the center, and projects to the front of the stove through a narrow horizontal slot, h, in the door-frame or in the jacketP j ust above the doors of the ash-box. When the handle is swung to the right of this slot the grate is properly sustained on the bar Y to support the fuel in the fire pot; but when swung to the left of the slot the preponderance of weight lies to the right of the bar Y, and it can then be easily turned in that direction to dump the fuel into the ash-box. As it swings over its center bar is caught by the prong f, and the grate is therefore prevented from falling down.

The pron gs cf are so arranged with relation to each other that when the grate is swung lock the grate-handle against being casually.

moved, and also to allow the door to slide down the requisite distance for closing the slot completely.

The fire-pot B is supported upon the graterim, and its interior is'cast or otherwise provided with a series of parallel vertical ribs, k,

to hold the fuel off from the walls, and thus form air-passages around it, by which a better combustion of the fuel is effected.

the passage of foul air from the room through the flue T, and therefore add very much to the ventilating capacity of the stove.

Having thus described my invention, what I claim is-- 1. The ash-box and foul-air fine made. in one continuous part, extending from the front to the rear of the stove under the grate, the ash-box opening at the front of the jacket, and the foul-air flue opening at the rear of the jacket, substantially as described, for the pur pose specified.

2. The ash-box and foul-air flue extending through the jacket from sideto side, the bot tom of said 'flue being above the level of the These air-passages also greatly assist in acceleratm g bottom of the ash-box, and the top of the two turn supporting the grate and fire-pot, subcombined forming a level surface around the stantially as described, for the purpose specigrate-opening, substantially as described, for fied. t the purpose specified. 3. The foul-air flue and ash-box made in Witnesses: one part, arranged transversely of the stove- E. A. ELLSWOR'LH,

jacket, being supported thereby, and in its L. M. HOSEA.

JOHN GROSSIUS. 

